Dispensing pump



Patented Oct. 15, 1929 UNITED STATES PATENT OFFICE PAUL B. RENFREW, F FORT WAYNE, INDIANA, ASSIGNOR TO S. F. BOWSER & COM- PANY, INGORPORATED, OF FORT WAYNE, INDIANA, .A CORPORATION DISPENSING PUMP Application filed December The invention relates to dispensing pumps .and particularly to liquid pumps wherein the liquid is delivered by air under pressure from a reservoir to a measuring receptacle.

In the above apparatus the reservoir is generally buried in the ground and the air under pressure is admitted to the reservoir to force the liquid therein through a pipe that is connected to both" the reservoir and the measuring receptacle. In some installations the air under pressure is supplied to an auxiliary reservoir to which the fluid is siphoned from a main storage reservoir. In order that none of the air under pressure shall pass into the receptacle as the reservoir is emptied,

, shall be broken.

Other advantages and objects will be set forth hereinafter.

The invention consists in the novel combination and arrangement of parts hereinafter described and illustrated in the drawings in which drawings Figure 1 is an elevation of a dispensing pump and storage reservoir connected thereto having the invention applied thereto, and Fig. 2 a vertical cross-sectional view of the air controlling valve.

In the illustrative embodiment of the invention, 1 represents a main storage reservoir or tank usually buried in the ground having the fill pipe 2 connected thereto through which the liquid to be dispensed is supplied to the reservoir. A conduit 4 communicates with the main reservoir and with an auxiliary tank 3, and it may be connected in any suitable manner thereto tosupply the tank with liquid from the reservoir. In the drawing 9; 1925. Serial No. 74,298.

the conduit 4 is shown as a siphon having a foot valve 5 within the reservoir 1.

A pipe 6 is connected to the'reservoir 1 andcommunicates with the upper portion thereof. This pipe is connected to the pipe 7 which leads upwardly through the pump housing 8 and communicates with an over flow pipe 9 disposed within the measuring bowl or receptacle 10 that is preferably transparent. A conduit 11 extends down through and toward the bottom of the auxiliary tank 3 and is suitably connected to have communication with the bottom of the bowl or receptacle 10. A hand pump mechanism 12 is connected to this discharge conduit 11 so that liquid may be pumped by hand from the reservoir 3 into the bowl 10 in case the pressure of air should fail as hereinafter de scribed. 13 represents a pipe line leading from a source of air under pressure. It is connected to the pipe 14 connected at its up per end to the casing of a controlling valve 15. 16 is an exhaust pipe connected to the said valve casing and 17 is a conduit connected to said casing and to a casing 18 that is suitably mounted on the auxiliary tank 3 and is adapted to communicate by means of a port 19 in its base with the upper inner portion of the tank 3. The pipes 14, 16 and 17 are in practice installed within the housing 8 but for clearnes's are shown exteriorly thereof.

A seat 20 is formed about the port 19 in the wall of the casing'18 and a valve 21 is adapted to engage said seat. The stem 22 of this valve projects downwardly through a constricted portion 19 of the port 19 and through a guide 23 suspended from the casing 18. A float 24 is attached to the lower end of the stem 22, and the stem is of the proper length so that the float, as the level of the liquid in the tank 3 falls, will cause the valve 21 to take its seat 20 before the said level reaches the intake end of the discharge conduit 11. When the tank 3 is full of liquid the float necessarily unseats the valve 21 and causes it to engage the upper wall of the casing 18 or the removable plug 25 closing the opening 23 therein. I

The valve 15- forms no part of my invention and is not illustrated in detail. It is adapted to connect the pipe 1% to the conduit 17 for admitting the air under pressure to the tank 3 and to connect the pipe 16 to the conduit 17 for venting the tank 3 after an operation thereof.

A pipe 2? is in communication with the bottom portion of the tank 3 and with the outside air, but normally closed to atmosphere. It is used to admit pressure for cleaning out the tank when desired.

In operation, the valve 15 is operated to admit the air under pressure into the tank 3, whereupon the liquid in the tank is forced through the discharge conduit 11 into the bowl 10. When the selected quantity of liquid has been delivered to the bowl or the liquid overflows back tothe reservoir 1 through the pipes 6, 7 and 9, the valve 15 is again operated to vent the reservoir 3 and the liquid in the reservoir 1 then fiows' through the siphon conduit into the tank 3.

As the liquid is dischar 'ed from the reservoir 3 its level therein or course falls and the float eventually descends with it. If the operator fails to operate the valve 15 to cut oil the air under pressure when the liquid overflows from the bowl, or if the quantity of liquid in the tank 3 is insuiiicient to fill the bowl or to supply thereto the desired amount, the float will cause the valve 21 to take its seat and cut off said air pressure so that none of it passes into the bowl.

The conduit 4; conducts the liquid from the main reservoir into the auxiliary tank at each operation of the mechanism. When it operates as a siphon and the said siphon is broken in any manner and no liquid flows from the main reservoir into the auxiliary tank, the operator will operate the 'hand pump to produce a suction on the main reservoir through the conduit 4; and thereby draw liquid through the same and reestablish the siphon.

It is thus seen that the supply of air under pressure to the auxiliary tank is automatically cut off by the valve 21 that is responsive to the level of the liquid in the'auxiliary tank; that the valve 21, therefore, prevents the air under pressure from entering the bowl, the tank 1 or into the main reservoir. 7

\Vhat I claim is:

1. The combination with a main reservoir, of an auxiliary reservoir at a lower level than the main reservoir, a siphon member to transfer liquid from. the main reservoir to the auxiliary reservoir, a dispensing mechanism, a conduit connected to the mechanism and to the auxiliary reservoir and extending toward the bottom of the auxiliary reservoir, a conduit for air under pressure lnwina communication with the auxiliary reservoir, a valve in the latter conduit to control the said communication and a float operatively connected to the valve and adapted to cause the valve to close when the liquid in the auxiliary tank has lowered to a selected level.

2. The combination with a main reservoir, of an auxiliary reservoir at a lower level than the main reservoir, a siphon member to transfer liquid from the main reservoir to the auxiliary reservoir, a dispensing mechanism, a conduit connected to the mechanism and to the auxiliary reservoir and extending toward the bottom of the auxiliary reservoir, a conduit for air under pressure having communication with the upper portion of the auxiliary reservoir, a valve to control the said communication, the valve having a stem extending within the auxiliary tank toward the bottom thereof and a float attached to the lower end of the stem and adapted to cause the valve to close when the liquid in the auxiliary tankhas lowered to a selected level above the lower end'of the first named conduit. r

In witness whereof I have hereunto set my hand this 27th day of November, 1925.

PAUL B. RENFREW. 

